Our forced valve rod pump adopts a mechanical opening valve, which makes the opening and closing of the traveling valve faster. A forced valve rod pump can effectively prevent "gas lock" and has the best effect in thermal recovery heavy oil wells. Forced valve rod pump controls the opening and closing of the traveling valve through a rigid connecting rod. The valve action time is <0.1 seconds, and gas cannot accumulate to form gas lock. Three-stage stroke:
Upstroke: The mechanical valve is forced to close, and the crude oil is sealed and lifted.
Downstroke: The valve body opens instantly, quickly fills the pump cavity, and avoids gas mixing.
Anti-gas lock closed loop: Real-time monitoring of pump cavity pressure, dynamic adjustment of valve opening and closing force, to ensure pure liquid flow suction.
Pump bore (mm ) | Length of plunger (m) | Length of barrel (m) | Size of connecting tubing (in ) | Range of stroke (m ) | Pump constant | Size of connecting sucker rod |
| 44 | 0.6~1.2 | 3.0~7.5 | 2 7/8TBG | 2.0~6.0 | 2.23 | CYG19 |
| 57 | 2 7/8TBG | 3.69 | CYG19 | |||
| 70 | 3 TBG | 5.52 | CYG22 | |||
| 83 | 3 1/2TBG | 7.70 | CYG25 |
1. The valve body and plunger of mechanical opening valve rod pump are coated with tungsten carbide, which can withstand 400℃ steam erosion. The service life of mechanical opening valve rod pump is twice that of traditional pumps.
2. The mechanical valve assembly of forced valve rod pump supports quick replacement, and the single maintenance time is shortened from 8 hours to 2 hours, and the spare parts commonality rate exceeds 90%.
3. The mechanical valve assembly of mechanical opening valve rod pump has zero delay in valve opening and closing with rigid connecting rod + spring buffer mechanism. The valve seat sealing surface is laser hardened, and the wear resistance life of mechanical opening valve rod pump exceeds 100,000 times.
4.The segmented plunger of mechanical opening valve rod pump (adjustable from 0.6 to 1.2 meters) adopts modular combination design, and the plunger length can be freely increased or decreased according to the well conditions. The surface of mechanical opening valve rod pump will be sprayed with tungsten carbide.
5. Pump with forced mechanic valve has a built-in pressure compensation channel to balance the pressure difference inside and outside the pump cavity and reduce the load on the sucker rod.
The core structure of pump with forced mechanic valve includes:
Sucker rod:
Positian limiter:
Barrel:
Putting rod:
Plunger:
Flow valve:
Inflow valve:
All structures of pump with forced mechanic valve are modularly designed, which is easy to maintain and replace, reducing on-site operation time and operation and maintenance costs.
Dongsheng came into being in 2000, and from that time up to the present, Dongsheng has been 26 years deeply engaged in the manufacture of petroleum machinery and through this time they have developed mature production processes and broad industry knowledge. The firm has earned the ISO 9001 Quality Management System certificate and has set up a thorough quality trackability system that covers the whole product life cycle, starting from raw materials up to the delivery of the final products.
Modern Production Base: The company is located in a site covering more than 20,000 square meters with industrial-standard facilities that can house large-scale manufacturing operations.
High-Proportion Technical Team: We now have a total of 96 working staff, among whom 20 are engineers and highly specialized technical personnel. In terms of percentage, technical professionals make up more than 20% of our employees, hence we have sufficient technical support for all our endeavors - from product development to tailor-made manufacturing.
Our large-scale manufacturing facilities are equipped with the capability to produce more than 20,000 units of equipment each year, which means we can confidently meet very large procurement orders. We also provide a complete range of customization services to support our clients' specific needs, which include producing unique designs and products.
Lead time for delivery is tightly monitored and goods are dispatched within 8-10 weeks. We pack the products in sturdy wooden crates which provide protection during the transportation.
Main Supplier for Domestic Oilfields: Our products have been highly indispensable to major domestic energy hubs such as the Liaohe, Daqing, Changqing, and Shengli oilfields.
Export Network Globally: Our business has extended to a variety of countries and regions such as the United States, Canada, Romania, India, and Indonesia, which is a clear indicator of our demonstrated ability to handle and provide services to overseas orders.
Q1: Can anti-gas lock heavy oil rod pump be used in oil wells with high sand content?
A: Certainly! The surface of the plunger of anti-gas lock heavy oil rod pump is coated with tungsten carbide having a hardness of HRC70. Combined with the precision filtration structure of the pump barrel, the anti-gas lock heavy oil rod pump can deal with sand content of ≤5%, and the wear rate is 60% lower than that of conventional pumps.
Q2: Is it a waste to use anti-gas lock heavy oil rod pump in low-yield wells?
A: Not at all! Anti-gas lock heavy oil rod pump's pump diameter and stroke can be adjusted in linkage (for example, 83mm pump diameter can be adjusted to the minimum stroke of 2.0 meters), and the displacement range is very wide, 50-800m³/d.
Q3: Does the valve type heavy oil recovery sucker rod pump support acidic environment (high H₂S content)?
A: Indeed! The valve-type heavy oil recovery sucker rod pump can be fitted with duplex stainless steel valve body + polytetrafluoroethylene seal, which is able to withstand H₂S concentration ≤2000ppm and has been tested to meet NACE MR0175 standard.
Q4: Does the replacement of the mechanical valve of the Valve type heavy oil recovery sucker rod pump require the entire pump to be removed?
A: No! Valve type heavy oil recovery sucker rod pump's valve group uses a top plug-in design, which can be directly disassembled by the workover rig. Single replacement requires only 2 hours and saves more than 50,000 yuan in operating costs per time.
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